Trolley-wheel.



No. 884,546. PATENTED APR. 14, 190s.

E. G. WALKER.

TROLLEY WHEEL.

APPLIUATION FILED MAY 18, 1906.

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FTQ-1 WTNESSES.' N VEN TOR.

L @M i www BYv "1 A ORNEK T 0 all whom 'it may concern:

FREDERICK G. WALKER, OF CLEVELAND, OHIO.

TROLLEY-WHEEL.

Specification of Letters Patent.

Patented April 14, 1908,.

Application led May 18, 1906. Serial No. 317,524.

Be it known that I, FREDERICK G. WALKER, a citizen of the United States, resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful lmprovement 'in Trolley-Wheels, of which the followi r, is a s ecication, the rinci le of the invention eing herein exp aine and the best mode in which l have contemplated applying that principle so as to distinguish it from other inventions.

My invention relates to means for mo-vably contacting electrical conductors, and is especially adapted for utilization u on electrically-operated traction-cars, an is commonly known as the trolley-wheel.

It is the object of said mvention to rovide a never-slip and self-oiling tro eywheel.

Said invention consists of means hereinafter fully described and specifically se forthin the claims. a

The annexed drawing and the following descriptionset forth in detail certain mechanism embodying the invention, such disclosed means constituting but one of various mechanical forms in which the principle of the invention may bel used. l

In said annexed drawing: Figure 1 represents a side elevation of the upper end of a trolley-pole, Land in ,connection therewith one form of m invention anda section of a trolley-wire.. A" ig. 2 represents a partial front elevation 'and a partial central vertical section of the features shown in Fig. 1. Figs. '3 and 4 represent central'vertical sections respectively of two modified lforms vof my inipnftion. 1 e errmg particu ar The upper part of fa trolley-pole is illustrated at A upon hiehvis secured a support B which is `fork-shaped,-z i.'-i shown, having an aperture b4 in each ,of its arms b, through each of which apertures isplaced a contactspring' C secured atv its bottom and 'exteriorly of the arms b of the support or trolley harp B, as plainly shown 1n. Fig. v2. At their lower extremities these contact-springs lact as spring-.bumpersV Secured at each of its ends 1n hubs t of the arms b .by means of cotter-pins d in the slots b2 is a journal-pin D; In the upper ,end of each ofthe arms l) is formed a suitable aperture b3 through 'which the cotter-pins may be driven out.

The upper end of each of the springs C is td-Figs. i and 2:`

U-shaped, whereby it is adapted to en age with journal-pin D, as plainly-shown in ig. 1, and is furthermore adapted to be readily withdrawn for purposes of repair or replacement without having to dismount the wheel by drawing out the Cotter-pin. Mounted upon said journal-pin D is a divided trolleywheel comprising the two parts E E, which parts are complementary one to the other to form a complete wheel, and there being formed between the same a pocket e8 ada ted to receive the trolley-wire, said parts e-v in' indeipendently rotatable upon the journa -pin Each of said parts' E is provided with a bushing e ada ted to form a bearing for 'the jlournalin lntermediately of the. whee -parts la and the upper endof the spring C are located washers c. Within each wheelart E is formed an annular oilcell e that 1s formed with a continuous, or substantially continuous internal opening e6 and with one or more external apertures adapted to be closedy by means of plugs e2 by the removal'of which the cell may be rep enished with oil. The bushings e are a perfect.

fit for the journal-pin D and can be readily replaced for repairs. Said bushings serve to ho d the oilv inside the wheel for self-oiling, and are provided with a ertures e1 adapted to communicate with a oresaid continuous opening e of the corresponding wheel part to feed the oil to said pin.

As shown in Fig. 2, the trolley-wire lies in the central plane of the trolleyole, which is the position it would assume w en the car is running upon a straight track, but when the car is rounding a curve the wire will climb into one of the positions illustrated in dotted lines'in said Fig. 2, its point of contact with either of the wheel-parts E being substantially in the central -verticahplane of said wheel-part, lwhereby only one of said wheelparts will be rotated, so that the rounding of ythe curve is not attendedcb any slippage between the wheel-part and t e trolle -wire, thereby very materiallyV reducing t e liabilityoic a separation of the two and a consequent breakage of contact.

In the form of devicel shown in Fig. 3, a

Acommon bushing e3 is provided for the two wheel-parts E E, one of the wheel-parts, the right-hand one in the view shown, being loosely mounted upon the bushing e3, so as to turn relatively to the latter, andthe lefthand one being fitted tightly upon said bushing; and in the form of device shown in Fig. 4 one bushing c* is provided for the wheel-part E2, and also a single oil-cell e. The path of the current is through the trolley-wire to the wheel-parts E, bushings e', washers c', spiiing-contacts C, support B, to the trolleyo e A. p The wheel-parts E and the bushings e are preferably made of a composition metal which is ver hard and a good conducting medium, while the journal-pin D is made of machinery' steel and case hardened. The washers c are preferably made of pressed steel, the contact-springs C of a compositionstamp lsheet metal, and the fork or support 'B vof malleable iron or a composition metal. As shown, the two faced surfaces c5 of the wheel-parts E are arranged parallel with me another and per endicular to the journalpin D. Obviousiy various changes in these f particulars can be made if found for any reason desirable, which changes it has not been thought necessary to illustrate as they do not relate to the subject-matter of the present invention. 1

vHaving thus described my invention in detail, thaty which I particularly point out and distinctly claim, is: Y

. 1. In a trolley wheel, the combination of a trolley harp; a pin mounted in said harp; a bushing fitted around said pin; a wheel member mounted upon said bushing, said wheel member being formed with an annular oilcell, having a continuous internal opening and an external opening for receiving an oil sup ly, and said bushing being provided wit a ertures adapted to communicate with said o1 -cell opening; a Washer of larger diameter than said bushing at one end of the same; and a spring bearing inwardly against said washer, the uppery end of said contact spring) being U-shaped whereby the saine may e removed without dismounting the wheel, substantially as described.

2. In a trolley-wheel, the combination of a trolley harp; a pin secured in said harp; 'two contiguous bushings fitted around said pin; a washer of larger diameter than said bushings at the respective outer ends of the same; springs respectively bearing inwardly against said washers; and two complementary wheel parts corresponding with said bushings, each of said wheel parts being formed with an annular oil cell having a substantially continuous internal opening, and each of said bushings being provided with apertures 4.adapted to register with such continuous opening of the corresponding wheel part.

3. In a trolley-wheel, the combination of a support; a pin secured therein; two independent com lementary wheel-parts mounted upon sai pin and arranged to form a pocket for the trolley-wire; bushings within said wheel-parts formmg'a bearing for said pin,.

said wheel-parts being formed with an mclosed oil-cell; and contact-springs engaging with said bushings, respectively, and secured to said support.

4. In a trolley wheel, the combination of a trolley-harp having an apertured arm; a pin secured in said trolley-harp; a bushing tted around said pin; a wheel member mounted upon said bushing, said Wheel member being formed with an, annular oil-cell having a continuous vinternal opening and an external opening for receiving an oil supply, and said bushing being provided with a ertures adapted to communicate with sai oil-cell opening a washer of larger diameter than said bushing at one end of the same; and a contact spring attached at its lower extremity exteriorly of said apertured arm and extending upwardly through the aperture in the same to laterally engage said washer, the upper end of said contact spring being U-shaped whereby the same may be removed without dismounting the wheel, substantially as described.

5. In a trolley-wheel, the combination of a trolley harp havin apertured arms; a pin secured in said trol ey harp; two contiguous bushin s fitted around said pin; a washer of larger iameter than said bushings at the respective outer ends of the same; two contact springs attached at their lower .extremities exteriorly of said arms, respectively, and extending upwardly through the a ertures in the same to `laterally engage sai washers;

and two complementary wheel parts corresponding with said bushings, each of said wheel parts being formed with an annular oil FREDERICK G. WALKER,

Attested by:

JN0. I*`.'O12-ERL1N,` G. W. SAYWELL. 

